#VU63952 Prototype pollution in json-pointer - CVE-2020-7709

Vulnerability identifier: #VU63952

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-7709

CWE-ID: CWE-94

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
json-pointer
Web applications / Modules and components for CMS

Vendor: Manuel Stofer

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation when processing slashes. A remote attacker can send a specially crafted request and execute arbitrary JavaScript code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

json-pointer: 0.0.2 - 0.6.0

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External links
https://github.com/manuelstofer/json-pointer/pull/34/files
https://snyk.io/vuln/SNYK-JS-JSONPOINTER-596925
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-598862

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.